WHITE MOLD DETECTION IN COMMON BEANS THROUGH LEAF REFLECTANCE SPECTROSCOPY

Machado Marley L.; Pinto Francisco de A. C.; de Paula Junior Trazilbo J.de Queiroz Daniel M.Cerqueira Ozires de A. T.

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WHITE MOLD DETECTION IN COMMON BEANS THROUGH LEAF REFLECTANCE SPECTROSCOPY

机译：WHITE MOLD DETECTION IN COMMON BEANS THROUGH LEAF REFLECTANCE SPECTROSCOPY

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abstract_textpThis study aimed to identify wavelengths based on leaf reflectance (400-1050 nm) to estimate white mold severity in common beans at different seasons. Two experiments were carried out, one during fall and another in winter. Partial Least Squares (PLS) regression was used to establish a set of wavelengths that better estimates the disease severity at a specific date. Therefore, observations were previously divided in two sub-groups. The first one (calibration) was used for model building and the second subgroup for model testing. Error measurements and correlation between measured and predicted values of disease severity index were employed to provide the best wavelengths in both seasons. The average indexes of each experiment were of 5.8 and 7.4, which is considered low. Spectral bands ranged between blue and green, green and red, and red and infrared, being most sensitive for disease estimation. Beyond the transition ranges, other spectral regions also presented wavelengths with potential to determine the disease severity, such as red, green, and near infrared./p/abstract_text

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来源
《engenharia agricola》 |2015年第6期|1117-1126|共10页
作者
Machado Marley L.; Pinto Francisco de A. C.; de Paula Junior Trazilbo J.de Queiroz Daniel M.Cerqueira Ozires de A. T.;
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作者单位

Epamig, Dept Pesquisa, Belo Horizonte, MG, Brazil;

Univ Fed Vicosa, Dept Engn Agr, Vicosa, MG, Brazil;

Epamig, Operacoes Tecn, Belo Horizonte, MG, BrazilUniv Fed Vicosa, Engn Agrimensura & Cartog, Vicosa, MG, Brazil;

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原文格式 PDF
正文语种英语
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关键词
Sclerotinia sclerotiorum; PLS regression; pigments; spectrum; absorption; SPECTRAL REFLECTANCE; REGRESSION; LEAVES;

WHITE MOLD DETECTION IN COMMON BEANS THROUGH LEAF REFLECTANCE SPECTROSCOPY

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